Granted Patent
Utility
US 6,491,182 · App. 08/817,435
Treating pressure vessels
Inventors:
Nigel John Henry Holroyd, Warren Hepples, Yi Gao
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Jul 29, 1997
Inventors
Nigel John Henry Holroyd
Warren Hepples
Yi Gao
Assignee (at issue)
LUXFER GROUP LIMITED
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.